Portion of a shoe outsole



FIG. 1 is a lateral frontal perspective view of a portion of a shoe outsole showing my new design;

FIG. 2 is a lateral rear perspective view thereof;

FIG. 3 is a medial frontal perspective view thereof; and,

FIG. 4 is a plan view thereof.

The broken line showing of the remainder of the shoe is for illustration purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe outsole, as shown and described. 